Sound-box.



L K. 'SCOTFORD.

scum) BOX.

APPLICATION FILED MAY 9, I916- Patented May 8, 1917.

n wars ear r ch. v

LOUIS K. SQOTFORD, OF CHICAGO, ILLINOIS.

SOUND-BOX.

new and useful Improvements in Sound Boxes, of which the following is a specification. I

- This invention relates to certain new and 10 useful-'- improvements in sound boxes for talking machines. The invention in its .preferable embodiment will be hereinafter more fully described and then particularly pointed out in the claims. In the drawings accompanying and forming part hereof:

Figure 1 is a front'elevation of a sound box made in accordance with my inven tion.

Fig. 2 is a rear view of part of the same.

Fig. 3 shows in perspective view the parts for supporting the stylus bar.

Fig. 4 shows in perspective view the stylus bar and the part to which it is con- 25 neeted.

'- Fig. 5 is. an elevation of the blank for forming the stylus bar.

Fig. 6 is a perspective view of the end of the blank showing the different steps in the course of the manufacture of the stylus bar.

Referring now to the details of the drawings by numerals: 1 designates the front ring of my sound box which is secured to the box proper designated by the numeral 2 in Fig. 2, the edges of this box being designated 3 in Fig. 1. Instead of being formed of a solid ring as usual, the ring 1 is split as indicated at 4 in Fig. l, and the box proper is also split as indicated at '5 in Fig. 2. The periphery of the box is formed with two lugs 7 and 8 shown in Figs. 1 and 2,-into which are threaded screws 10 and 11 with cone-shaped ends 12 and 13 shown in Fig. 3. The stylus bar is preferably formed as illustrated in Figs. 1 and 4 and is designated by the numeral 14. The rear end of this stylus bar has a perforation 15 through which projects the central part of an arbor 16 having formed thereon a boss 17. After the stylus bar has been slipped over the arbor 16 a sleeve 18, forming another boss, is slipped over the end. of the arbor l6 and the part 55 16-17 and the stylus bar 14 and sleeve 18 are all soldered together, thus making,

Specification of Letters Patent.

Patehted May 8', 191W.

Application filed may 9, 1916. Serial No. 96,343.

in effect, one integral structure. The arbor 16 is centered between the screws 10 and 11 as illustrated in Figs. 1 and 2. Of course it will'be understood that the other end 20 of the stylus bar is secured to the diaphragm in any desirable manner. The parts, preferably made as above described, are assembled in the position shown in Figs. 1 and 2, the screws 10 and 11 preferably being screwed home. In order to provide for the most delicate adjustment the "rear of the box 2, on opposite sides of the split 5, is providedwvith two projections 22 and 23' (see Fig. 2). A screw 24 passes through the projection 23 and is threaded into the projection 22 so that by adjusting this screw, the space between'the split. of the ring may be adjusted as necessary. By preference I place a rubber washer 26 between the head of the screw 24 and the projection 23. By this construction I am enabled to obtain the most delicate adjustment, and do this by the movement of a single screw, and do not have to depend upon the adjustment of the screws 10 and 11 which are usually provided with lock nuts.

The stylus bar is formed froin a blank 7 of the shape shown in Fig. 5 and as will be seen from this figure, the blanks can be easily punched from sheet metal. After 3 the blanks have been formed, as shown in said figure, the eye or end 20 is bent from' the. position shown at a in Fig. 6, at right angles to the stylus proper, to the position shown at b' in the same figure. Then the eye 20 is bent by giving it a twist and an upward bend as shown by the arrows in Fig. 6, thus producing a stylus of the shape shown in Fig. 4, and at c in Fig. 6. I regard this construction of stylus bar as a great improvement upon those now' used.

The socketto receive the needle is preferably formed of the construction shown in Fig. 2. As,there illustrated the socket proper is formed of one piece of metal designated by the numeral 22 and at one end is provided with a chuck-like arrangement and at the other end is provided with a head 23 having a slot 24. The other element of the this device asshown in said Fig. 4. The

thin stylus bar is inserted in the slot 24 of the head 23 and soldered therein, thus making practically one integral structure. I desire to call particular attention to the fact that the socket is secured to the stylus bar at a point directly between the arbor 16, which constitutes the pivotal point of the stylus bar, and the eye of the bar which is secured to the diaphragm. By connecting the needle socket to the stylus bar at this point, I obtain the best possible results as the vibrations do not have to pass through the comparatively heavy pivot construction of the bar but are transmitted direct from the stylus bar'to the diaphragm.

From the foregoing and accompanying drawings it Will be seen that I have produced a very simple form of sound box and stylus bar construction, one that will give the most delicate adjustment and which will also transmit the vibrations directly from the needle to the stylus bar.

3. In a sound box, the combination of a box proper having lugs projecting therefrom, a stylus bar pivotally supported between said lugs, the box being split and having lugs projecting from its ends on opposite sides of the split, and a screw for adjusting the last named lugs, substantially as described.

4:. In a sound box, the combination ofa box proper having lugs projecting therefrom, a stylus bar pivotally supported be-.

tween said lugs, the box being split and having lugs projecting fromits ends on opposite sides of the split.., a screw for adjusting the last named lugs, and a flexible washer between the head ofsaid screw and one of said lugs, substantially as-described.

5. In a sound box, the combination of a box proper having lugs projecting therefrom, astylus bar having its arbor supported between said lugs, said box being split and having lugs projecting therefrom on opposite sides of said split, and a screw for adjustably securing said last named lugs together, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

LOUIS K. SCOTFORD.

Witnesses:

HENRY F. I-Lxoxnn, F. M. BIELENBERG. 

